So if they do the 2 wheel drive Suburban first only people that want to build a station wagon will buy it. (I am not saying anything bad about them as I think they are cool.) The models and different versions are endless with just the 2 wheel drive. Now if they wait for a year or two and release a 4 wheel drive version then they will open another selection of Suburban models and the parts for people to build 4 wheel drive trucks. Makes sense to me, if the 4 wheel drive comes out first some people will buy one kit and swap the drive train and not buy the extra kit.